NiCoMnSb合金的相变和多功能特性研究  

A Study of the Phase Transition and Multifunctional Properties in Ni-Co-Mn-Sb Alloy

作　　者：姚杨 许佳昊 师帅[1] 金逸飞 韩志达[1,2] 房勇[1,2] 钱斌[1,2] 江学范[1,2] YAO Yang;XU Jiahao;SHI Shuai;JIN Yifei;HAN Zhida;FANG Yong;QIAN Bin;JIANG Xuefan(School of Physics and Electronic Engineering,Changshu Institute of Technology,Changshu 215500,China;Jiangsu Laboratory of Advanced Functional Materials,Changshu Institute of Technology,Changshu 215500,China)

机构地区：[1]常熟理工学院物理与电子工程学院,江苏常熟215500 [2]常熟理工学院江苏省新型功能材料重点建设实验室,江苏常熟215500

出　　处：《常熟理工学院学报》2018年第2期24-28,共5页Journal of Changshu Institute of Technology

基　　金：国家自然科学基金项目"Ni-Mn基铁磁形状记忆合金的低温相分离和交换偏置效应研究"(51371004)

摘　　要：采用电弧熔炼和高温退火的方法制备了Ni_(42)Co_8Mn_(39)Sb_(11)铁磁形状记忆合金.用X射线衍射表征样品的晶体结构,用综合物性测试系统对材料的马氏体相变以及马氏体相变附近的磁热效应、磁电阻效应和磁致应变效应进行了表征.结果表明,样品在220 K左右发生了从弱磁马氏体到铁磁奥氏体的相变,随磁场增加,马氏体转变温度向低温偏移.在马氏体相变附近,样品不仅具有较大的磁热效应,还具有磁电阻效应和磁致应变效应,这些效应都是由磁场驱动马氏体相变导致的.这些结果说明Ni-Co-Mn-Sb合金在磁制冷、磁传感、磁驱动领域有着潜在的应用.Ni42Co8Mn39Sb11 ferromagnetic shape memory alloy was prepared by arc melting followed by hightemperature annealing.The crystal structure of the samples was characterized by X-ray diffraction.The martensitic transformation,magnetocaloric,magnetoresistance,and magnetostrictive effects of the sample were measured by a physical property measurement system.The results show that the sample undergoes a transition from weak-magnetic martensitic to ferromagnetic austenitic phase,and that the transition temperature decreases with the increase of magnetic field.The sample exhibits a large magnetocaloric effect,magnetoresistance as well as magnetostrictive effect,which result from the field-induced martensitic transition.These results imply that Ni-Co-Mn-Sb alloy has a potential technological application in the field of magnetic refrigeration,magnetic sensor,and magnetic driver.

关 键 词：马氏体转变 磁热效应 磁电阻效应 磁致应变效应 

分 类 号：O482.6[理学—固体物理]